static CURLcode rtmp_connect(struct connectdata *conn, bool *done)
{
RTMP *r = conn->proto.generic;
SET_RCVTIMEO(tv,10);
r->m_sb.sb_socket = conn->sock[FIRSTSOCKET];
/* We have to know if it's a write before we send the
* connect request packet
*/
if(conn->data->set.upload)
r->Link.protocol |= RTMP_FEATURE_WRITE;
/* For plain streams, use the buffer toggle trick to keep data flowing */
if(!(r->Link.lFlags & RTMP_LF_LIVE) &&
!(r->Link.protocol & RTMP_FEATURE_HTTP))
r->Link.lFlags |= RTMP_LF_BUFX;
(void)curlx_nonblock(r->m_sb.sb_socket, FALSE);
setsockopt(r->m_sb.sb_socket, SOL_SOCKET, SO_RCVTIMEO,
(char *)&tv, sizeof(tv));
if(!RTMP_Connect1(r, NULL))
return CURLE_FAILED_INIT;
/* Clients must send a periodic BytesReceived report to the server */
r->m_bSendCounter = true;
*done = TRUE;
conn->recv[FIRSTSOCKET] = rtmp_recv;
conn->send[FIRSTSOCKET] = rtmp_send;
return CURLE_OK;
}
/* singleipconnect() connects to the given IP only, and it may return without
having connected if used from the multi interface. */
static curl_socket_t
singleipconnect(struct connectdata *conn,
const Curl_addrinfo *ai,
long timeout_ms,
bool *connected)
{
struct Curl_sockaddr_ex addr;
char addr_buf[128];
int rc;
int error;
bool isconnected;
struct SessionHandle *data = conn->data;
curl_socket_t sockfd;
CURLcode res;
const void *iptoprint;
struct sockaddr_in * const sa4 = (void *)&addr.sa_addr;
#ifdef ENABLE_IPV6
struct sockaddr_in6 * const sa6 = (void *)&addr.sa_addr;
#endif
/*
* The Curl_sockaddr_ex structure is basically libcurl's external API
* curl_sockaddr structure with enough space available to directly hold
* any protocol-specific address structures. The variable declared here
* will be used to pass / receive data to/from the fopensocket callback
* if this has been set, before that, it is initialized from parameters.
*/
addr.family = ai->ai_family;
addr.socktype = conn->socktype;
addr.protocol = ai->ai_protocol;
addr.addrlen = ai->ai_addrlen;
if(addr.addrlen > sizeof(struct Curl_sockaddr_storage))
addr.addrlen = sizeof(struct Curl_sockaddr_storage);
memcpy(&addr.sa_addr, ai->ai_addr, addr.addrlen);
*connected = FALSE; /* default is not connected */
if(data->set.fopensocket)
/*
* If the opensocket callback is set, all the destination address
* information is passed to the callback. Depending on this information the
* callback may opt to abort the connection, this is indicated returning
* CURL_SOCKET_BAD; otherwise it will return a not-connected socket. When
* the callback returns a valid socket the destination address information
* might have been changed and this 'new' address will actually be used
* here to connect.
*/
sockfd = data->set.fopensocket(data->set.opensocket_client,
CURLSOCKTYPE_IPCXN,
(struct curl_sockaddr *)&addr);
else
/* opensocket callback not set, so simply create the socket now */
sockfd = socket(addr.family, addr.socktype, addr.protocol);
if(sockfd == CURL_SOCKET_BAD)
/* no socket, no connection */
return CURL_SOCKET_BAD;
#if defined(ENABLE_IPV6) && defined(HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID)
if (conn->scope && (addr.family == AF_INET6))
sa6->sin6_scope_id = conn->scope;
#endif
/* FIXME: do we have Curl_printable_address-like with struct sockaddr* as
argument? */
#if defined(HAVE_SYS_UN_H) && defined(AF_UNIX)
if(addr.family == AF_UNIX) {
infof(data, " Trying %s... ",
((const struct sockaddr_un*)(&addr.sa_addr))->sun_path);
snprintf(data->info.ip, MAX_IPADR_LEN, "%s",
((const struct sockaddr_un*)(&addr.sa_addr))->sun_path);
strcpy(conn->ip_addr_str, data->info.ip);
}
else
#endif
{
#ifdef ENABLE_IPV6
if(addr.family == AF_INET6) {
iptoprint = &sa6->sin6_addr;
conn->bits.ipv6 = TRUE;
}
else
#endif
{
iptoprint = &sa4->sin_addr;
}
if(Curl_inet_ntop(addr.family, iptoprint, addr_buf,
sizeof(addr_buf)) != NULL) {
infof(data, " Trying %s... ", addr_buf);
snprintf(data->info.ip, MAX_IPADR_LEN, "%s", addr_buf);
strcpy(conn->ip_addr_str, data->info.ip);
}
}
if(data->set.tcp_nodelay)
tcpnodelay(conn, sockfd);
nosigpipe(conn, sockfd);
Curl_sndbufset(sockfd);
if(data->set.fsockopt) {
/* activate callback for setting socket options */
error = data->set.fsockopt(data->set.sockopt_client,
sockfd,
CURLSOCKTYPE_IPCXN);
if(error) {
sclose(sockfd); /* close the socket and bail out */
return CURL_SOCKET_BAD;
}
}
/* possibly bind the local end to an IP, interface or port */
res = bindlocal(conn, sockfd, addr.family);
if(res) {
sclose(sockfd); /* close socket and bail out */
return CURL_SOCKET_BAD;
}
/* set socket non-blocking */
curlx_nonblock(sockfd, TRUE);
/* Connect TCP sockets, bind UDP */
if(conn->socktype == SOCK_STREAM)
rc = connect(sockfd, &addr.sa_addr, addr.addrlen);
else
rc = 0;
if(-1 == rc) {
error = SOCKERRNO;
switch (error) {
case EINPROGRESS:
case EWOULDBLOCK:
#if defined(EAGAIN)
#if (EAGAIN) != (EWOULDBLOCK)
/* On some platforms EAGAIN and EWOULDBLOCK are the
* same value, and on others they are different, hence
* the odd #if
*/
case EAGAIN:
#endif
#endif
rc = waitconnect(conn, sockfd, timeout_ms);
break;
default:
/* unknown error, fallthrough and try another address! */
failf(data, "Failed to connect to %s: %s",
addr_buf, Curl_strerror(conn,error));
data->state.os_errno = error;
break;
}
}
/* The 'WAITCONN_TIMEOUT == rc' comes from the waitconnect(), and not from
connect(). We can be sure of this since connect() cannot return 1. */
if((WAITCONN_TIMEOUT == rc) &&
(data->state.used_interface == Curl_if_multi)) {
/* Timeout when running the multi interface */
return sockfd;
}
isconnected = verifyconnect(sockfd, &error);
if(!rc && isconnected) {
/* we are connected, awesome! */
*connected = TRUE; /* this is a true connect */
infof(data, "connected\n");
Curl_updateconninfo(conn, sockfd);
return sockfd;
}
else if(WAITCONN_TIMEOUT == rc)
infof(data, "Timeout\n");
else {
data->state.os_errno = error;
infof(data, "%s\n", Curl_strerror(conn, error));
}
/* connect failed or timed out */
sclose(sockfd);
return CURL_SOCKET_BAD;
}
/*
* singleipconnect()
*
* Note that even on connect fail it returns CURLE_OK, but with 'sock' set to
* CURL_SOCKET_BAD. Other errors will however return proper errors.
*
* singleipconnect() connects to the given IP only, and it may return without
* having connected.
*/
static CURLcode singleipconnect(struct connectdata *conn,
const Curl_addrinfo *ai,
curl_socket_t *sockp)
{
struct Curl_sockaddr_ex addr;
int rc;
int error = 0;
bool isconnected = FALSE;
struct SessionHandle *data = conn->data;
curl_socket_t sockfd;
CURLcode result;
char ipaddress[MAX_IPADR_LEN];
long port;
bool is_tcp;
*sockp = CURL_SOCKET_BAD;
result = Curl_socket(conn, ai, &addr, &sockfd);
if(result)
/* Failed to create the socket, but still return OK since we signal the
lack of socket as well. This allows the parent function to keep looping
over alternative addresses/socket families etc. */
return CURLE_OK;
/* store remote address and port used in this connection attempt */
if(!getaddressinfo((struct sockaddr*)&addr.sa_addr,
ipaddress, &port)) {
/* malformed address or bug in inet_ntop, try next address */
error = ERRNO;
failf(data, "sa_addr inet_ntop() failed with errno %d: %s",
error, Curl_strerror(conn, error));
Curl_closesocket(conn, sockfd);
return CURLE_OK;
}
infof(data, " Trying %s...\n", ipaddress);
is_tcp = (addr.family == AF_INET || addr.family == AF_INET6) &&
addr.socktype == SOCK_STREAM;
if(is_tcp && data->set.tcp_nodelay)
tcpnodelay(conn, sockfd);
nosigpipe(conn, sockfd);
Curl_sndbufset(sockfd);
if(is_tcp && data->set.tcp_keepalive)
tcpkeepalive(data, sockfd);
if(data->set.fsockopt) {
/* activate callback for setting socket options */
error = data->set.fsockopt(data->set.sockopt_client,
sockfd,
CURLSOCKTYPE_IPCXN);
if(error == CURL_SOCKOPT_ALREADY_CONNECTED)
isconnected = TRUE;
else if(error) {
Curl_closesocket(conn, sockfd); /* close the socket and bail out */
return CURLE_ABORTED_BY_CALLBACK;
}
}
/* possibly bind the local end to an IP, interface or port */
if(addr.family == AF_INET || addr.family == AF_INET6) {
result = bindlocal(conn, sockfd, addr.family,
Curl_ipv6_scope((struct sockaddr*)&addr.sa_addr));
if(result) {
Curl_closesocket(conn, sockfd); /* close socket and bail out */
if(result == CURLE_UNSUPPORTED_PROTOCOL) {
/* The address family is not supported on this interface.
We can continue trying addresses */
return CURLE_COULDNT_CONNECT;
}
return result;
}
}
/* set socket non-blocking */
(void)curlx_nonblock(sockfd, TRUE);
conn->connecttime = Curl_tvnow();
if(conn->num_addr > 1)
Curl_expire_latest(data, conn->timeoutms_per_addr);
/* Connect TCP sockets, bind UDP */
if(!isconnected && (conn->socktype == SOCK_STREAM)) {
rc = connect(sockfd, &addr.sa_addr, addr.addrlen);
if(-1 == rc)
error = SOCKERRNO;
}
else {
*sockp = sockfd;
return CURLE_OK;
}
#ifdef ENABLE_IPV6
conn->bits.ipv6 = (addr.family == AF_INET6)?TRUE:FALSE;
#endif
if(-1 == rc) {
switch(error) {
case EINPROGRESS:
case EWOULDBLOCK:
#if defined(EAGAIN)
#if (EAGAIN) != (EWOULDBLOCK)
/* On some platforms EAGAIN and EWOULDBLOCK are the
* same value, and on others they are different, hence
* the odd #if
*/
case EAGAIN:
#endif
#endif
result = CURLE_OK;
break;
default:
/* unknown error, fallthrough and try another address! */
infof(data, "Immediate connect fail for %s: %s\n",
ipaddress, Curl_strerror(conn,error));
data->state.os_errno = error;
/* connect failed */
Curl_closesocket(conn, sockfd);
result = CURLE_COULDNT_CONNECT;
}
}
if(!result)
*sockp = sockfd;
return result;
}
/*
* singleipconnect()
*
* Note that even on connect fail it returns CURLE_OK, but with 'sock' set to
* CURL_SOCKET_BAD. Other errors will however return proper errors.
*
* singleipconnect() connects to the given IP only, and it may return without
* having connected if used from the multi interface.
*/
static CURLcode
singleipconnect(struct connectdata *conn,
const Curl_addrinfo *ai,
long timeout_ms,
curl_socket_t *sockp,
bool *connected)
{
struct Curl_sockaddr_ex addr;
int rc;
int error = 0;
bool isconnected = FALSE;
struct SessionHandle *data = conn->data;
curl_socket_t sockfd;
CURLcode res = CURLE_OK;
*sockp = CURL_SOCKET_BAD;
*connected = FALSE; /* default is not connected */
res = Curl_socket(conn, ai, &addr, &sockfd);
if(res)
/* Failed to create the socket, but still return OK since we signal the
lack of socket as well. This allows the parent function to keep looping
over alternative addresses/socket families etc. */
return CURLE_OK;
/* store remote address and port used in this connection attempt */
if(!getaddressinfo((struct sockaddr*)&addr.sa_addr,
conn->primary_ip, &conn->primary_port)) {
/* malformed address or bug in inet_ntop, try next address */
error = ERRNO;
failf(data, "sa_addr inet_ntop() failed with errno %d: %s",
error, Curl_strerror(conn, error));
Curl_closesocket(conn, sockfd);
return CURLE_OK;
}
memcpy(conn->ip_addr_str, conn->primary_ip, MAX_IPADR_LEN);
infof(data, " Trying %s...\n", conn->ip_addr_str);
Curl_persistconninfo(conn);
if(data->set.tcp_nodelay)
tcpnodelay(conn, sockfd);
nosigpipe(conn, sockfd);
Curl_sndbufset(sockfd);
if(data->set.tcp_keepalive)
tcpkeepalive(data, sockfd);
if(data->set.fsockopt) {
/* activate callback for setting socket options */
error = data->set.fsockopt(data->set.sockopt_client,
sockfd,
CURLSOCKTYPE_IPCXN);
if(error == CURL_SOCKOPT_ALREADY_CONNECTED)
isconnected = TRUE;
else if(error) {
Curl_closesocket(conn, sockfd); /* close the socket and bail out */
return CURLE_ABORTED_BY_CALLBACK;
}
}
/* possibly bind the local end to an IP, interface or port */
res = bindlocal(conn, sockfd, addr.family);
if(res) {
Curl_closesocket(conn, sockfd); /* close socket and bail out */
return res;
}
/* set socket non-blocking */
curlx_nonblock(sockfd, TRUE);
/* Connect TCP sockets, bind UDP */
if(!isconnected && (conn->socktype == SOCK_STREAM)) {
rc = connect(sockfd, &addr.sa_addr, addr.addrlen);
if(-1 == rc)
error = SOCKERRNO;
conn->connecttime = Curl_tvnow();
if(conn->num_addr > 1)
Curl_expire(data, conn->timeoutms_per_addr);
}
else
rc = 0;
if(-1 == rc) {
switch (error) {
case EINPROGRESS:
case EWOULDBLOCK:
#if defined(EAGAIN)
#if (EAGAIN) != (EWOULDBLOCK)
/* On some platforms EAGAIN and EWOULDBLOCK are the
* same value, and on others they are different, hence
* the odd #if
*/
case EAGAIN:
#endif
#endif
rc = waitconnect(conn, sockfd, timeout_ms);
if(WAITCONN_ABORTED == rc) {
Curl_closesocket(conn, sockfd);
return CURLE_ABORTED_BY_CALLBACK;
}
break;
default:
/* unknown error, fallthrough and try another address! */
failf(data, "Failed to connect to %s: %s",
conn->ip_addr_str, Curl_strerror(conn,error));
data->state.os_errno = error;
break;
}
}
/* The 'WAITCONN_TIMEOUT == rc' comes from the waitconnect(), and not from
connect(). We can be sure of this since connect() cannot return 1. */
if((WAITCONN_TIMEOUT == rc) &&
(data->state.used_interface == Curl_if_multi)) {
/* Timeout when running the multi interface */
*sockp = sockfd;
return CURLE_OK;
}
if(!isconnected)
isconnected = verifyconnect(sockfd, &error);
if(!rc && isconnected) {
/* we are connected, awesome! */
*connected = TRUE; /* this is a true connect */
infof(data, "connected\n");
#ifdef ENABLE_IPV6
conn->bits.ipv6 = (addr.family == AF_INET6)?TRUE:FALSE;
#endif
Curl_updateconninfo(conn, sockfd);
*sockp = sockfd;
return CURLE_OK;
}
else if(WAITCONN_TIMEOUT == rc)
infof(data, "Timeout\n");
else {
data->state.os_errno = error;
infof(data, "%s\n", Curl_strerror(conn, error));
}
/* connect failed or timed out */
Curl_closesocket(conn, sockfd);
return CURLE_OK;
}
/*
* singleipconnect()
*
* Note that even on connect fail it returns CURLE_OK, but with 'sock' set to
* CURL_SOCKET_BAD. Other errors will however return proper errors.
*
* singleipconnect() connects to the given IP only, and it may return without
* having connected if used from the multi interface.
*/
static CURLcode
singleipconnect(struct connectdata *conn,
const Curl_addrinfo *ai,
long timeout_ms,
curl_socket_t *sockp,
bool *connected)
{
struct Curl_sockaddr_ex addr;
int rc;
int error;
bool isconnected = FALSE;
struct SessionHandle *data = conn->data;
curl_socket_t sockfd;
CURLcode res = CURLE_OK;
#if defined(ENABLE_IPV6) && defined(HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID)
struct sockaddr_in6 * const sa6 = (void *)&addr.sa_addr;
#endif
*sockp = CURL_SOCKET_BAD;
/*
* The Curl_sockaddr_ex structure is basically libcurl's external API
* curl_sockaddr structure with enough space available to directly hold
* any protocol-specific address structures. The variable declared here
* will be used to pass / receive data to/from the fopensocket callback
* if this has been set, before that, it is initialized from parameters.
*/
addr.family = ai->ai_family;
addr.socktype = conn->socktype;
addr.protocol = conn->socktype==SOCK_DGRAM?IPPROTO_UDP:ai->ai_protocol;
addr.addrlen = ai->ai_addrlen;
if(addr.addrlen > sizeof(struct Curl_sockaddr_storage))
addr.addrlen = sizeof(struct Curl_sockaddr_storage);
memcpy(&addr.sa_addr, ai->ai_addr, addr.addrlen);
*connected = FALSE; /* default is not connected */
if(data->set.fopensocket)
/*
* If the opensocket callback is set, all the destination address
* information is passed to the callback. Depending on this information the
* callback may opt to abort the connection, this is indicated returning
* CURL_SOCKET_BAD; otherwise it will return a not-connected socket. When
* the callback returns a valid socket the destination address information
* might have been changed and this 'new' address will actually be used
* here to connect.
*/
sockfd = data->set.fopensocket(data->set.opensocket_client,
CURLSOCKTYPE_IPCXN,
(struct curl_sockaddr *)&addr);
else
/* opensocket callback not set, so simply create the socket now */
sockfd = socket(addr.family, addr.socktype, addr.protocol);
if(sockfd == CURL_SOCKET_BAD)
/* no socket, no connection */
return CURLE_OK;
#if defined(ENABLE_IPV6) && defined(HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID)
if (conn->scope && (addr.family == AF_INET6))
sa6->sin6_scope_id = conn->scope;
#endif
/* store remote address and port used in this connection attempt */
if(!getaddressinfo((struct sockaddr*)&addr.sa_addr,
conn->primary_ip, &conn->primary_port)) {
/* malformed address or bug in inet_ntop, try next address */
error = ERRNO;
failf(data, "sa_addr inet_ntop() failed with errno %d: %s",
error, Curl_strerror(conn, error));
sclose(sockfd);
return CURLE_OK;
}
memcpy(conn->ip_addr_str, conn->primary_ip, MAX_IPADR_LEN);
infof(data, " Trying %s... ", conn->ip_addr_str);
Curl_persistconninfo(conn);
#ifdef ENABLE_IPV6
if(addr.family == AF_INET6)
conn->bits.ipv6 = TRUE;
#endif
if(data->set.tcp_nodelay)
tcpnodelay(conn, sockfd);
nosigpipe(conn, sockfd);
Curl_sndbufset(sockfd);
if(data->set.fsockopt) {
/* activate callback for setting socket options */
error = data->set.fsockopt(data->set.sockopt_client,
sockfd,
CURLSOCKTYPE_IPCXN);
if(error == CURL_SOCKOPT_ALREADY_CONNECTED)
isconnected = TRUE;
else if(error) {
sclose(sockfd); /* close the socket and bail out */
return CURLE_ABORTED_BY_CALLBACK;
}
}
/* possibly bind the local end to an IP, interface or port */
res = bindlocal(conn, sockfd, addr.family);
if(res) {
sclose(sockfd); /* close socket and bail out */
return res;
}
/* set socket non-blocking */
curlx_nonblock(sockfd, TRUE);
/* Connect TCP sockets, bind UDP */
if(!isconnected && (conn->socktype == SOCK_STREAM)) {
rc = connect(sockfd, &addr.sa_addr, addr.addrlen);
conn->connecttime = Curl_tvnow();
if(conn->num_addr > 1)
Curl_expire(data, conn->timeoutms_per_addr);
}
else
rc = 0;
if(-1 == rc) {
error = SOCKERRNO;
switch (error) {
case EINPROGRESS:
case EWOULDBLOCK:
#if defined(EAGAIN)
#if (EAGAIN) != (EWOULDBLOCK)
/* On some platforms EAGAIN and EWOULDBLOCK are the
* same value, and on others they are different, hence
* the odd #if
*/
case EAGAIN:
#endif
#endif
rc = waitconnect(conn, sockfd, timeout_ms);
if(WAITCONN_ABORTED == rc) {
sclose(sockfd);
return CURLE_ABORTED_BY_CALLBACK;
}
break;
default:
/* unknown error, fallthrough and try another address! */
failf(data, "Failed to connect to %s: %s",
conn->ip_addr_str, Curl_strerror(conn,error));
data->state.os_errno = error;
break;
}
}
/* The 'WAITCONN_TIMEOUT == rc' comes from the waitconnect(), and not from
connect(). We can be sure of this since connect() cannot return 1. */
if((WAITCONN_TIMEOUT == rc) &&
(data->state.used_interface == Curl_if_multi)) {
/* Timeout when running the multi interface */
*sockp = sockfd;
return CURLE_OK;
}
if(!isconnected)
isconnected = verifyconnect(sockfd, &error);
if(!rc && isconnected) {
/* we are connected, awesome! */
*connected = TRUE; /* this is a true connect */
infof(data, "connected\n");
Curl_updateconninfo(conn, sockfd);
*sockp = sockfd;
return CURLE_OK;
}
else if(WAITCONN_TIMEOUT == rc)
infof(data, "Timeout\n");
else {
data->state.os_errno = error;
infof(data, "%s\n", Curl_strerror(conn, error));
}
/* connect failed or timed out */
sclose(sockfd);
return CURLE_OK;
}
/*
* singleipconnect()
*
* Note that even on connect fail it returns CURLE_OK, but with 'sock' set to
* CURL_SOCKET_BAD. Other errors will however return proper errors.
*
* singleipconnect() connects to the given IP only, and it may return without
* having connected.
*/
static CURLcode singleipconnect(struct connectdata *conn,
const Curl_addrinfo *ai,
curl_socket_t *sockp)
{
struct Curl_sockaddr_ex addr;
int rc = -1;
int error = 0;
bool isconnected = FALSE;
struct Curl_easy *data = conn->data;
curl_socket_t sockfd;
CURLcode result;
char ipaddress[MAX_IPADR_LEN];
long port;
bool is_tcp;
*sockp = CURL_SOCKET_BAD;
result = Curl_socket(conn, ai, &addr, &sockfd);
if(result)
/* Failed to create the socket, but still return OK since we signal the
lack of socket as well. This allows the parent function to keep looping
over alternative addresses/socket families etc. */
return CURLE_OK;
/* store remote address and port used in this connection attempt */
if(!getaddressinfo((struct sockaddr*)&addr.sa_addr,
ipaddress, &port)) {
/* malformed address or bug in inet_ntop, try next address */
failf(data, "sa_addr inet_ntop() failed with errno %d: %s",
errno, Curl_strerror(conn, errno));
Curl_closesocket(conn, sockfd);
return CURLE_OK;
}
infof(data, " Trying %s...\n", ipaddress);
#ifdef ENABLE_IPV6
is_tcp = (addr.family == AF_INET || addr.family == AF_INET6) &&
addr.socktype == SOCK_STREAM;
#else
is_tcp = (addr.family == AF_INET) && addr.socktype == SOCK_STREAM;
#endif
if(is_tcp && data->set.tcp_nodelay)
Curl_tcpnodelay(conn, sockfd);
nosigpipe(conn, sockfd);
Curl_sndbufset(sockfd);
if(is_tcp && data->set.tcp_keepalive)
tcpkeepalive(data, sockfd);
if(data->set.fsockopt) {
/* activate callback for setting socket options */
error = data->set.fsockopt(data->set.sockopt_client,
sockfd,
CURLSOCKTYPE_IPCXN);
if(error == CURL_SOCKOPT_ALREADY_CONNECTED)
isconnected = TRUE;
else if(error) {
Curl_closesocket(conn, sockfd); /* close the socket and bail out */
return CURLE_ABORTED_BY_CALLBACK;
}
}
/* possibly bind the local end to an IP, interface or port */
if(addr.family == AF_INET
#ifdef ENABLE_IPV6
|| addr.family == AF_INET6
#endif
) {
result = bindlocal(conn, sockfd, addr.family,
Curl_ipv6_scope((struct sockaddr*)&addr.sa_addr));
if(result) {
Curl_closesocket(conn, sockfd); /* close socket and bail out */
if(result == CURLE_UNSUPPORTED_PROTOCOL) {
/* The address family is not supported on this interface.
We can continue trying addresses */
return CURLE_COULDNT_CONNECT;
}
return result;
}
}
/* set socket non-blocking */
(void)curlx_nonblock(sockfd, TRUE);
conn->connecttime = Curl_tvnow();
if(conn->num_addr > 1)
Curl_expire(data, conn->timeoutms_per_addr, EXPIRE_DNS_PER_NAME);
/* Connect TCP sockets, bind UDP */
if(!isconnected && (conn->socktype == SOCK_STREAM)) {
if(conn->bits.tcp_fastopen) {
#if defined(CONNECT_DATA_IDEMPOTENT) /* OS X */
#ifdef HAVE_BUILTIN_AVAILABLE
if(__builtin_available(macOS 10.11, iOS 9.0, tvOS 9.0, watchOS 2.0, *)) {
#endif /* HAVE_BUILTIN_AVAILABLE */
sa_endpoints_t endpoints;
endpoints.sae_srcif = 0;
endpoints.sae_srcaddr = NULL;
endpoints.sae_srcaddrlen = 0;
endpoints.sae_dstaddr = &addr.sa_addr;
endpoints.sae_dstaddrlen = addr.addrlen;
rc = connectx(sockfd, &endpoints, SAE_ASSOCID_ANY,
CONNECT_RESUME_ON_READ_WRITE | CONNECT_DATA_IDEMPOTENT,
NULL, 0, NULL, NULL);
#ifdef HAVE_BUILTIN_AVAILABLE
}
else {
rc = connect(sockfd, &addr.sa_addr, addr.addrlen);
}
#endif /* HAVE_BUILTIN_AVAILABLE */
#elif defined(MSG_FASTOPEN) /* Linux */
if(conn->given->flags & PROTOPT_SSL)
rc = connect(sockfd, &addr.sa_addr, addr.addrlen);
else
rc = 0; /* Do nothing */
#endif
}
else {
static CURLcode gskit_connect_step1(struct connectdata *conn, int sockindex)
{
struct Curl_easy *data = conn->data;
struct ssl_connect_data *connssl = &conn->ssl[sockindex];
gsk_handle envir;
CURLcode result;
int rc;
const char * const keyringfile = SSL_CONN_CONFIG(CAfile);
const char * const keyringpwd = SSL_SET_OPTION(key_passwd);
const char * const keyringlabel = SSL_SET_OPTION(cert);
const long int ssl_version = SSL_CONN_CONFIG(version);
const bool verifypeer = SSL_CONN_CONFIG(verifypeer);
const char * const hostname = SSL_IS_PROXY()? conn->http_proxy.host.name:
conn->host.name;
const char *sni;
unsigned int protoflags;
long timeout;
Qso_OverlappedIO_t commarea;
int sockpair[2];
static const int sobufsize = CURL_MAX_WRITE_SIZE;
/* Create SSL environment, start (preferably asynchronous) handshake. */
connssl->handle = (gsk_handle) NULL;
connssl->iocport = -1;
connssl->localfd = -1;
connssl->remotefd = -1;
/* GSKit supports two ways of specifying an SSL context: either by
* application identifier (that should have been defined at the system
* level) or by keyring file, password and certificate label.
* Local certificate name (CURLOPT_SSLCERT) is used to hold either the
* application identifier of the certificate label.
* Key password (CURLOPT_KEYPASSWD) holds the keyring password.
* It is not possible to have different keyrings for the CAs and the
* local certificate. We thus use the CA file (CURLOPT_CAINFO) to identify
* the keyring file.
* If no key password is given and the keyring is the system keyring,
* application identifier mode is tried first, as recommended in IBM doc.
*/
envir = (gsk_handle) NULL;
if(keyringlabel && *keyringlabel && !keyringpwd &&
!strcmp(keyringfile, CURL_CA_BUNDLE)) {
/* Try application identifier mode. */
init_environment(data, &envir, keyringlabel, (const char *) NULL,
(const char *) NULL, (const char *) NULL);
}
if(!envir) {
/* Use keyring mode. */
result = init_environment(data, &envir, (const char *) NULL,
keyringfile, keyringlabel, keyringpwd);
if(result)
return result;
}
/* Create secure session. */
result = gskit_status(data, gsk_secure_soc_open(envir, &connssl->handle),
"gsk_secure_soc_open()", CURLE_SSL_CONNECT_ERROR);
gsk_environment_close(&envir);
if(result)
return result;
/* Establish a pipelining socket pair for SSL over SSL. */
if(conn->proxy_ssl[sockindex].use) {
if(inetsocketpair(sockpair))
return CURLE_SSL_CONNECT_ERROR;
connssl->localfd = sockpair[0];
connssl->remotefd = sockpair[1];
setsockopt(connssl->localfd, SOL_SOCKET, SO_RCVBUF,
(void *) sobufsize, sizeof sobufsize);
setsockopt(connssl->remotefd, SOL_SOCKET, SO_RCVBUF,
(void *) sobufsize, sizeof sobufsize);
setsockopt(connssl->localfd, SOL_SOCKET, SO_SNDBUF,
(void *) sobufsize, sizeof sobufsize);
setsockopt(connssl->remotefd, SOL_SOCKET, SO_SNDBUF,
(void *) sobufsize, sizeof sobufsize);
curlx_nonblock(connssl->localfd, TRUE);
curlx_nonblock(connssl->remotefd, TRUE);
}
/* Determine which SSL/TLS version should be enabled. */
sni = hostname;
switch (ssl_version) {
case CURL_SSLVERSION_SSLv2:
protoflags = CURL_GSKPROTO_SSLV2_MASK;
sni = NULL;
break;
case CURL_SSLVERSION_SSLv3:
protoflags = CURL_GSKPROTO_SSLV3_MASK;
sni = NULL;
break;
case CURL_SSLVERSION_DEFAULT:
case CURL_SSLVERSION_TLSv1:
protoflags = CURL_GSKPROTO_TLSV10_MASK |
CURL_GSKPROTO_TLSV11_MASK | CURL_GSKPROTO_TLSV12_MASK;
break;
case CURL_SSLVERSION_TLSv1_0:
protoflags = CURL_GSKPROTO_TLSV10_MASK;
break;
case CURL_SSLVERSION_TLSv1_1:
protoflags = CURL_GSKPROTO_TLSV11_MASK;
break;
case CURL_SSLVERSION_TLSv1_2:
protoflags = CURL_GSKPROTO_TLSV12_MASK;
break;
case CURL_SSLVERSION_TLSv1_3:
failf(data, "GSKit: TLS 1.3 is not yet supported");
return CURLE_SSL_CONNECT_ERROR;
default:
failf(data, "Unrecognized parameter passed via CURLOPT_SSLVERSION");
return CURLE_SSL_CONNECT_ERROR;
}
/* Process SNI. Ignore if not supported (on OS400 < V7R1). */
if(sni) {
result = set_buffer(data, connssl->handle,
GSK_SSL_EXTN_SERVERNAME_REQUEST, sni, TRUE);
if(result == CURLE_UNSUPPORTED_PROTOCOL)
result = CURLE_OK;
}
/* Set session parameters. */
if(!result) {
/* Compute the handshake timeout. Since GSKit granularity is 1 second,
we round up the required value. */
timeout = Curl_timeleft(data, NULL, TRUE);
if(timeout < 0)
result = CURLE_OPERATION_TIMEDOUT;
else
result = set_numeric(data, connssl->handle, GSK_HANDSHAKE_TIMEOUT,
(timeout + 999) / 1000);
}
if(!result)
result = set_numeric(data, connssl->handle, GSK_OS400_READ_TIMEOUT, 1);
if(!result)
result = set_numeric(data, connssl->handle, GSK_FD, connssl->localfd >= 0?
connssl->localfd: conn->sock[sockindex]);
if(!result)
result = set_ciphers(conn, connssl->handle, &protoflags);
if(!protoflags) {
failf(data, "No SSL protocol/cipher combination enabled");
result = CURLE_SSL_CIPHER;
}
if(!result)
result = set_enum(data, connssl->handle, GSK_PROTOCOL_SSLV2,
(protoflags & CURL_GSKPROTO_SSLV2_MASK)?
GSK_PROTOCOL_SSLV2_ON: GSK_PROTOCOL_SSLV2_OFF, FALSE);
if(!result)
result = set_enum(data, connssl->handle, GSK_PROTOCOL_SSLV3,
(protoflags & CURL_GSKPROTO_SSLV3_MASK)?
GSK_PROTOCOL_SSLV3_ON: GSK_PROTOCOL_SSLV3_OFF, FALSE);
if(!result)
result = set_enum(data, connssl->handle, GSK_PROTOCOL_TLSV1,
(protoflags & CURL_GSKPROTO_TLSV10_MASK)?
GSK_PROTOCOL_TLSV1_ON: GSK_PROTOCOL_TLSV1_OFF, FALSE);
if(!result) {
result = set_enum(data, connssl->handle, GSK_PROTOCOL_TLSV11,
(protoflags & CURL_GSKPROTO_TLSV11_MASK)?
GSK_TRUE: GSK_FALSE, TRUE);
if(result == CURLE_UNSUPPORTED_PROTOCOL) {
result = CURLE_OK;
if(protoflags == CURL_GSKPROTO_TLSV11_MASK) {
failf(data, "TLS 1.1 not yet supported");
result = CURLE_SSL_CIPHER;
}
}
}
if(!result) {
result = set_enum(data, connssl->handle, GSK_PROTOCOL_TLSV12,
(protoflags & CURL_GSKPROTO_TLSV12_MASK)?
GSK_TRUE: GSK_FALSE, TRUE);
if(result == CURLE_UNSUPPORTED_PROTOCOL) {
result = CURLE_OK;
if(protoflags == CURL_GSKPROTO_TLSV12_MASK) {
failf(data, "TLS 1.2 not yet supported");
result = CURLE_SSL_CIPHER;
}
}
}
if(!result)
result = set_enum(data, connssl->handle, GSK_SERVER_AUTH_TYPE,
verifypeer? GSK_SERVER_AUTH_FULL:
GSK_SERVER_AUTH_PASSTHRU, FALSE);
if(!result) {
/* Start handshake. Try asynchronous first. */
memset(&commarea, 0, sizeof commarea);
connssl->iocport = QsoCreateIOCompletionPort();
if(connssl->iocport != -1) {
result = gskit_status(data,
gsk_secure_soc_startInit(connssl->handle,
connssl->iocport,
&commarea),
"gsk_secure_soc_startInit()",
CURLE_SSL_CONNECT_ERROR);
if(!result) {
connssl->connecting_state = ssl_connect_2;
return CURLE_OK;
}
else
close_async_handshake(connssl);
}
else if(errno != ENOBUFS)
result = gskit_status(data, GSK_ERROR_IO,
"QsoCreateIOCompletionPort()", 0);
else if(conn->proxy_ssl[sockindex].use) {
/* Cannot pipeline while handshaking synchronously. */
result = CURLE_SSL_CONNECT_ERROR;
}
else {
/* No more completion port available. Use synchronous IO. */
result = gskit_status(data, gsk_secure_soc_init(connssl->handle),
"gsk_secure_soc_init()", CURLE_SSL_CONNECT_ERROR);
if(!result) {
connssl->connecting_state = ssl_connect_3;
return CURLE_OK;
}
}
}
/* Error: rollback. */
close_one(connssl, conn, sockindex);
return result;
}
static int
inetsocketpair(int sv[2])
{
int lfd; /* Listening socket. */
int sfd; /* Server socket. */
int cfd; /* Client socket. */
int len;
struct sockaddr_in addr1;
struct sockaddr_in addr2;
/* Create listening socket on a local dynamic port. */
lfd = socket(AF_INET, SOCK_STREAM, 0);
if(lfd < 0)
return -1;
memset((char *) &addr1, 0, sizeof addr1);
addr1.sin_family = AF_INET;
addr1.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
addr1.sin_port = 0;
if(bind(lfd, (struct sockaddr *) &addr1, sizeof addr1) ||
listen(lfd, 2) < 0) {
close(lfd);
return -1;
}
/* Get the allocated port. */
len = sizeof addr1;
if(getsockname(lfd, (struct sockaddr *) &addr1, &len) < 0) {
close(lfd);
return -1;
}
/* Create the client socket. */
cfd = socket(AF_INET, SOCK_STREAM, 0);
if(cfd < 0) {
close(lfd);
return -1;
}
/* Request unblocking connection to the listening socket. */
curlx_nonblock(cfd, TRUE);
if(connect(cfd, (struct sockaddr *) &addr1, sizeof addr1) < 0 &&
errno != EINPROGRESS) {
close(lfd);
close(cfd);
return -1;
}
/* Get the client dynamic port for intrusion check below. */
len = sizeof addr2;
if(getsockname(cfd, (struct sockaddr *) &addr2, &len) < 0) {
close(lfd);
close(cfd);
return -1;
}
/* Accept the incoming connection and get the server socket. */
curlx_nonblock(lfd, TRUE);
for(;;) {
len = sizeof addr1;
sfd = accept(lfd, (struct sockaddr *) &addr1, &len);
if(sfd < 0) {
close(lfd);
close(cfd);
return -1;
}
/* Check for possible intrusion from an external process. */
if(addr1.sin_addr.s_addr == addr2.sin_addr.s_addr &&
addr1.sin_port == addr2.sin_port)
break;
/* Intrusion: reject incoming connection. */
close(sfd);
}
/* Done, return sockets and succeed. */
close(lfd);
curlx_nonblock(cfd, FALSE);
sv[0] = cfd;
sv[1] = sfd;
return 0;
}
/*
* This function logs in to a SOCKS5 proxy and sends the specifics to the final
* destination server.
*/
CURLcode Curl_SOCKS5(const char *proxy_name,
const char *proxy_password,
const char *hostname,
int remote_port,
int sockindex,
struct connectdata *conn)
{
/*
According to the RFC1928, section "6. Replies". This is what a SOCK5
replies:
+----+-----+-------+------+----------+----------+
|VER | REP | RSV | ATYP | BND.ADDR | BND.PORT |
+----+-----+-------+------+----------+----------+
| 1 | 1 | X'00' | 1 | Variable | 2 |
+----+-----+-------+------+----------+----------+
Where:
o VER protocol version: X'05'
o REP Reply field:
o X'00' succeeded
*/
unsigned char socksreq[600]; /* room for large user/pw (255 max each) */
ssize_t actualread;
ssize_t written;
int result;
CURLcode code;
curl_socket_t sock = conn->sock[sockindex];
struct SessionHandle *data = conn->data;
long timeout;
bool socks5_resolve_local = (bool)(data->set.proxytype == CURLPROXY_SOCKS5);
const size_t hostname_len = strlen(hostname);
ssize_t packetsize = 0;
/* RFC1928 chapter 5 specifies max 255 chars for domain name in packet */
if(!socks5_resolve_local && hostname_len > 255)
{
infof(conn->data,"SOCKS5: server resolving disabled for hostnames of "
"length > 255 [actual len=%zu]\n", hostname_len);
socks5_resolve_local = TRUE;
}
/* get timeout */
timeout = Curl_timeleft(conn, NULL, TRUE);
if(timeout < 0) {
/* time-out, bail out, go home */
failf(data, "Connection time-out");
return CURLE_OPERATION_TIMEDOUT;
}
curlx_nonblock(sock, TRUE);
/* wait until socket gets connected */
result = Curl_socket_ready(CURL_SOCKET_BAD, sock, (int)timeout);
if(-1 == result) {
failf(conn->data, "SOCKS5: no connection here");
return CURLE_COULDNT_CONNECT;
}
else if(0 == result) {
failf(conn->data, "SOCKS5: connection timeout");
return CURLE_OPERATION_TIMEDOUT;
}
if(result & CURL_CSELECT_ERR) {
failf(conn->data, "SOCKS5: error occured during connection");
return CURLE_COULDNT_CONNECT;
}
socksreq[0] = 5; /* version */
#if defined(HAVE_GSSAPI) || defined(USE_WINDOWS_SSPI)
socksreq[1] = (char)(proxy_name ? 3 : 2); /* number of methods (below) */
socksreq[2] = 0; /* no authentication */
socksreq[3] = 1; /* gssapi */
socksreq[4] = 2; /* username/password */
#else
socksreq[1] = (char)(proxy_name ? 2 : 1); /* number of methods (below) */
socksreq[2] = 0; /* no authentication */
socksreq[3] = 2; /* username/password */
#endif
curlx_nonblock(sock, FALSE);
code = Curl_write_plain(conn, sock, (char *)socksreq, (2 + (int)socksreq[1]),
&written);
if((code != CURLE_OK) || (written != (2 + (int)socksreq[1]))) {
failf(data, "Unable to send initial SOCKS5 request.");
return CURLE_COULDNT_CONNECT;
}
curlx_nonblock(sock, TRUE);
result = Curl_socket_ready(sock, CURL_SOCKET_BAD, (int)timeout);
if(-1 == result) {
failf(conn->data, "SOCKS5 nothing to read");
return CURLE_COULDNT_CONNECT;
}
else if(0 == result) {
failf(conn->data, "SOCKS5 read timeout");
return CURLE_OPERATION_TIMEDOUT;
}
if(result & CURL_CSELECT_ERR) {
failf(conn->data, "SOCKS5 read error occured");
return CURLE_RECV_ERROR;
}
curlx_nonblock(sock, FALSE);
result=Curl_blockread_all(conn, sock, (char *)socksreq, 2, &actualread,
timeout);
if((result != CURLE_OK) || (actualread != 2)) {
failf(data, "Unable to receive initial SOCKS5 response.");
return CURLE_COULDNT_CONNECT;
}
if(socksreq[0] != 5) {
failf(data, "Received invalid version in initial SOCKS5 response.");
return CURLE_COULDNT_CONNECT;
}
if(socksreq[1] == 0) {
/* Nothing to do, no authentication needed */
;
}
#if defined(HAVE_GSSAPI) || defined(USE_WINDOWS_SSPI)
else if(socksreq[1] == 1) {
code = Curl_SOCKS5_gssapi_negotiate(sockindex, conn);
if(code != CURLE_OK) {
failf(data, "Unable to negotiate SOCKS5 gssapi context.");
return CURLE_COULDNT_CONNECT;
}
}
#endif
else if(socksreq[1] == 2) {
/* Needs user name and password */
size_t userlen, pwlen;
int len;
if(proxy_name && proxy_password) {
userlen = strlen(proxy_name);
pwlen = strlen(proxy_password);
}
else {
userlen = 0;
pwlen = 0;
}
/* username/password request looks like
* +----+------+----------+------+----------+
* |VER | ULEN | UNAME | PLEN | PASSWD |
* +----+------+----------+------+----------+
* | 1 | 1 | 1 to 255 | 1 | 1 to 255 |
* +----+------+----------+------+----------+
*/
len = 0;
socksreq[len++] = 1; /* username/pw subnegotiation version */
socksreq[len++] = (unsigned char) userlen;
if(proxy_name && userlen)
memcpy(socksreq + len, proxy_name, userlen);
len += (int)userlen;
socksreq[len++] = (unsigned char) pwlen;
if(proxy_password && pwlen)
memcpy(socksreq + len, proxy_password, pwlen);
len += (int)pwlen;
code = Curl_write_plain(conn, sock, (char *)socksreq, len, &written);
if((code != CURLE_OK) || (len != written)) {
failf(data, "Failed to send SOCKS5 sub-negotiation request.");
return CURLE_COULDNT_CONNECT;
}
result=Curl_blockread_all(conn, sock, (char *)socksreq, 2, &actualread,
timeout);
if((result != CURLE_OK) || (actualread != 2)) {
failf(data, "Unable to receive SOCKS5 sub-negotiation response.");
return CURLE_COULDNT_CONNECT;
}
/* ignore the first (VER) byte */
if(socksreq[1] != 0) { /* status */
failf(data, "User was rejected by the SOCKS5 server (%d %d).",
socksreq[0], socksreq[1]);
return CURLE_COULDNT_CONNECT;
}
/* Everything is good so far, user was authenticated! */
}
else {
/* error */
#if defined(HAVE_GSSAPI) || defined(USE_WINDOWS_SSPI)
if(socksreq[1] == 255) {
#else
if(socksreq[1] == 1) {
failf(data,
"SOCKS5 GSSAPI per-message authentication is not supported.");
return CURLE_COULDNT_CONNECT;
}
else if(socksreq[1] == 255) {
#endif
if(!proxy_name || !*proxy_name) {
failf(data,
"No authentication method was acceptable. (It is quite likely"
" that the SOCKS5 server wanted a username/password, since none"
" was supplied to the server on this connection.)");
}
else {
failf(data, "No authentication method was acceptable.");
}
return CURLE_COULDNT_CONNECT;
}
else {
failf(data,
"Undocumented SOCKS5 mode attempted to be used by server.");
return CURLE_COULDNT_CONNECT;
}
}
/* Authentication is complete, now specify destination to the proxy */
socksreq[0] = 5; /* version (SOCKS5) */
socksreq[1] = 1; /* connect */
socksreq[2] = 0; /* must be zero */
if(!socks5_resolve_local) {
packetsize = (ssize_t)(5 + hostname_len + 2);
socksreq[3] = 3; /* ATYP: domain name = 3 */
socksreq[4] = (char) hostname_len; /* address length */
memcpy(&socksreq[5], hostname, hostname_len); /* address bytes w/o NULL */
*((unsigned short*)&socksreq[hostname_len+5]) =
htons((unsigned short)remote_port);
}
else {
struct Curl_dns_entry *dns;
Curl_addrinfo *hp=NULL;
int rc = Curl_resolv(conn, hostname, remote_port, &dns);
packetsize = 10;
socksreq[3] = 1; /* IPv4 = 1 */
if(rc == CURLRESOLV_ERROR)
return CURLE_COULDNT_RESOLVE_HOST;
if(rc == CURLRESOLV_PENDING) {
/* this requires that we're in "wait for resolve" state */
code = Curl_wait_for_resolv(conn, &dns);
if(code != CURLE_OK)
return code;
}
/*
* We cannot use 'hostent' as a struct that Curl_resolv() returns. It
* returns a Curl_addrinfo pointer that may not always look the same.
*/
if(dns)
hp=dns->addr;
if(hp) {
char buf[64];
unsigned short ip[4];
Curl_printable_address(hp, buf, sizeof(buf));
if(4 == sscanf( buf, "%hu.%hu.%hu.%hu",
&ip[0], &ip[1], &ip[2], &ip[3])) {
socksreq[4] = (unsigned char)ip[0];
socksreq[5] = (unsigned char)ip[1];
socksreq[6] = (unsigned char)ip[2];
socksreq[7] = (unsigned char)ip[3];
}
else
hp = NULL; /* fail! */
Curl_resolv_unlock(data, dns); /* not used anymore from now on */
}
if(!hp) {
failf(data, "Failed to resolve \"%s\" for SOCKS5 connect.",
hostname);
return CURLE_COULDNT_RESOLVE_HOST;
}
*((unsigned short*)&socksreq[8]) = htons((unsigned short)remote_port);
}
#if defined(HAVE_GSSAPI) || defined(USE_WINDOWS_SSPI)
if(conn->socks5_gssapi_enctype) {
failf(data, "SOCKS5 gssapi protection not yet implemented.");
} else
#endif
code = Curl_write_plain(conn, sock, (char *)socksreq, packetsize, &written);
if((code != CURLE_OK) || (written != packetsize)) {
failf(data, "Failed to send SOCKS5 connect request.");
return CURLE_COULDNT_CONNECT;
}
packetsize = 10; /* minimum packet size is 10 */
#if defined(HAVE_GSSAPI) || defined(USE_WINDOWS_SSPI)
if(conn->socks5_gssapi_enctype) {
failf(data, "SOCKS5 gssapi protection not yet implemented.");
} else
#endif
result = Curl_blockread_all(conn, sock, (char *)socksreq, packetsize,
&actualread, timeout);
if((result != CURLE_OK) || (actualread != packetsize)) {
failf(data, "Failed to receive SOCKS5 connect request ack.");
return CURLE_COULDNT_CONNECT;
}
if(socksreq[0] != 5) { /* version */
failf(data,
"SOCKS5 reply has wrong version, version should be 5.");
return CURLE_COULDNT_CONNECT;
}
if(socksreq[1] != 0) { /* Anything besides 0 is an error */
failf(data,
"Can't complete SOCKS5 connection to %d.%d.%d.%d:%d. (%d)",
(unsigned char)socksreq[4], (unsigned char)socksreq[5],
(unsigned char)socksreq[6], (unsigned char)socksreq[7],
(unsigned int)ntohs(*(unsigned short*)(&socksreq[8])),
socksreq[1]);
return CURLE_COULDNT_CONNECT;
}
/* Fix: in general, returned BND.ADDR is variable length parameter by RFC
1928, so the reply packet should be read until the end to avoid errors at
subsequent protocol level.
+----+-----+-------+------+----------+----------+
|VER | REP | RSV | ATYP | BND.ADDR | BND.PORT |
+----+-----+-------+------+----------+----------+
| 1 | 1 | X'00' | 1 | Variable | 2 |
+----+-----+-------+------+----------+----------+
ATYP:
o IP v4 address: X'01', BND.ADDR = 4 byte
o domain name: X'03', BND.ADDR = [ 1 byte length, string ]
o IP v6 address: X'04', BND.ADDR = 16 byte
*/
/* Calculate real packet size */
if(socksreq[3] == 3) {
/* domain name */
int addrlen = (int) socksreq[4];
packetsize = 5 + addrlen + 2;
}
else if(socksreq[3] == 4) {
/* IPv6 */
packetsize = 4 + 16 + 2;
}
/* At this point we already read first 10 bytes */
#if defined(HAVE_GSSAPI) || defined(USE_WINDOWS_SSPI)
if(!conn->socks5_gssapi_enctype) {
/* decrypt_gssapi_blockread already read the whole packet */
#endif
if(packetsize > 10) {
packetsize -= 10;
result = Curl_blockread_all(conn, sock, (char *)&socksreq[10],
packetsize, &actualread, timeout);
if((result != CURLE_OK) || (actualread != packetsize)) {
failf(data, "Failed to receive SOCKS5 connect request ack.");
return CURLE_COULDNT_CONNECT;
}
}
#if defined(HAVE_GSSAPI) || defined(USE_WINDOWS_SSPI)
}
#endif
curlx_nonblock(sock, TRUE);
return CURLE_OK; /* Proxy was successful! */
}
/*
* This function logs in to a SOCKS4 proxy and sends the specifics to the final
* destination server.
*
* Reference :
* http://socks.permeo.com/protocol/socks4.protocol
*
* Note :
* Set protocol4a=true for "SOCKS 4A (Simple Extension to SOCKS 4 Protocol)"
* Nonsupport "Identification Protocol (RFC1413)"
*/
CURLcode Curl_SOCKS4(const char *proxy_name,
const char *hostname,
int remote_port,
int sockindex,
struct connectdata *conn,
bool protocol4a)
{
#define SOCKS4REQLEN 262
unsigned char socksreq[SOCKS4REQLEN]; /* room for SOCKS4 request incl. user
id */
int result;
CURLcode code;
curl_socket_t sock = conn->sock[sockindex];
long timeout;
struct SessionHandle *data = conn->data;
/* get timeout */
timeout = Curl_timeleft(conn, NULL, TRUE);
if(timeout < 0) {
/* time-out, bail out, go home */
failf(data, "Connection time-out");
return CURLE_OPERATION_TIMEDOUT;
}
curlx_nonblock(sock, FALSE);
/*
* Compose socks4 request
*
* Request format
*
* +----+----+----+----+----+----+----+----+----+----+....+----+
* | VN | CD | DSTPORT | DSTIP | USERID |NULL|
* +----+----+----+----+----+----+----+----+----+----+....+----+
* # of bytes: 1 1 2 4 variable 1
*/
socksreq[0] = 4; /* version (SOCKS4) */
socksreq[1] = 1; /* connect */
*((unsigned short*)&socksreq[2]) = htons((unsigned short)remote_port);
/* DNS resolve only for SOCKS4, not SOCKS4a */
if (!protocol4a) {
struct Curl_dns_entry *dns;
Curl_addrinfo *hp=NULL;
int rc;
rc = Curl_resolv(conn, hostname, remote_port, &dns);
if(rc == CURLRESOLV_ERROR)
return CURLE_COULDNT_RESOLVE_PROXY;
if(rc == CURLRESOLV_PENDING)
/* ignores the return code, but 'dns' remains NULL on failure */
(void)Curl_wait_for_resolv(conn, &dns);
/*
* We cannot use 'hostent' as a struct that Curl_resolv() returns. It
* returns a Curl_addrinfo pointer that may not always look the same.
*/
if(dns)
hp=dns->addr;
if(hp) {
char buf[64];
unsigned short ip[4];
Curl_printable_address(hp, buf, sizeof(buf));
if(4 == sscanf( buf, "%hu.%hu.%hu.%hu",
&ip[0], &ip[1], &ip[2], &ip[3])) {
/* Set DSTIP */
socksreq[4] = (unsigned char)ip[0];
socksreq[5] = (unsigned char)ip[1];
socksreq[6] = (unsigned char)ip[2];
socksreq[7] = (unsigned char)ip[3];
}
else
hp = NULL; /* fail! */
Curl_resolv_unlock(data, dns); /* not used anymore from now on */
}
if(!hp) {
failf(data, "Failed to resolve \"%s\" for SOCKS4 connect.",
hostname);
return CURLE_COULDNT_RESOLVE_HOST;
}
}
/*
* This is currently not supporting "Identification Protocol (RFC1413)".
*/
socksreq[8] = 0; /* ensure empty userid is NUL-terminated */
if(proxy_name)
strlcat((char*)socksreq + 8, proxy_name, sizeof(socksreq) - 8);
/*
* Make connection
*/
{
ssize_t actualread;
ssize_t written;
ssize_t hostnamelen = 0;
int packetsize = 9 +
(int)strlen((char*)socksreq + 8); /* size including NUL */
/* If SOCKS4a, set special invalid IP address 0.0.0.x */
if (protocol4a) {
socksreq[4] = 0;
socksreq[5] = 0;
socksreq[6] = 0;
socksreq[7] = 1;
/* If still enough room in buffer, also append hostname */
hostnamelen = (ssize_t)strlen(hostname) + 1; /* length including NUL */
if (packetsize + hostnamelen <= SOCKS4REQLEN)
strcpy((char*)socksreq + packetsize, hostname);
else
hostnamelen = 0; /* Flag: hostname did not fit in buffer */
}
/* Send request */
code = Curl_write_plain(conn, sock, (char *)socksreq,
packetsize + hostnamelen,
&written);
if((code != CURLE_OK) || (written != packetsize + hostnamelen)) {
failf(data, "Failed to send SOCKS4 connect request.");
return CURLE_COULDNT_CONNECT;
}
if (protocol4a && hostnamelen == 0) {
/* SOCKS4a with very long hostname - send that name separately */
hostnamelen = (ssize_t)strlen(hostname) + 1;
code = Curl_write_plain(conn, sock, (char *)hostname, hostnamelen,
&written);
if((code != CURLE_OK) || (written != hostnamelen)) {
failf(data, "Failed to send SOCKS4 connect request.");
return CURLE_COULDNT_CONNECT;
}
}
packetsize = 8; /* receive data size */
/* Receive response */
result = Curl_blockread_all(conn, sock, (char *)socksreq, packetsize,
&actualread, timeout);
if((result != CURLE_OK) || (actualread != packetsize)) {
failf(data, "Failed to receive SOCKS4 connect request ack.");
return CURLE_COULDNT_CONNECT;
}
/*
* Response format
*
* +----+----+----+----+----+----+----+----+
* | VN | CD | DSTPORT | DSTIP |
* +----+----+----+----+----+----+----+----+
* # of bytes: 1 1 2 4
*
* VN is the version of the reply code and should be 0. CD is the result
* code with one of the following values:
*
* 90: request granted
* 91: request rejected or failed
* 92: request rejected because SOCKS server cannot connect to
* identd on the client
* 93: request rejected because the client program and identd
* report different user-ids
*/
/* wrong version ? */
if(socksreq[0] != 0) {
failf(data,
"SOCKS4 reply has wrong version, version should be 4.");
return CURLE_COULDNT_CONNECT;
}
/* Result */
switch(socksreq[1])
{
case 90:
if (protocol4a)
infof(data, "SOCKS4a request granted.\n");
else
infof(data, "SOCKS4 request granted.\n");
break;
case 91:
failf(data,
"Can't complete SOCKS4 connection to %d.%d.%d.%d:%d. (%d)"
", request rejected or failed.",
(unsigned char)socksreq[4], (unsigned char)socksreq[5],
(unsigned char)socksreq[6], (unsigned char)socksreq[7],
(unsigned int)ntohs(*(unsigned short*)(&socksreq[8])),
socksreq[1]);
return CURLE_COULDNT_CONNECT;
case 92:
failf(data,
"Can't complete SOCKS4 connection to %d.%d.%d.%d:%d. (%d)"
", request rejected because SOCKS server cannot connect to "
"identd on the client.",
(unsigned char)socksreq[4], (unsigned char)socksreq[5],
(unsigned char)socksreq[6], (unsigned char)socksreq[7],
(unsigned int)ntohs(*(unsigned short*)(&socksreq[8])),
socksreq[1]);
return CURLE_COULDNT_CONNECT;
case 93:
failf(data,
"Can't complete SOCKS4 connection to %d.%d.%d.%d:%d. (%d)"
", request rejected because the client program and identd "
"report different user-ids.",
(unsigned char)socksreq[4], (unsigned char)socksreq[5],
(unsigned char)socksreq[6], (unsigned char)socksreq[7],
(unsigned int)ntohs(*(unsigned short*)(&socksreq[8])),
socksreq[1]);
return CURLE_COULDNT_CONNECT;
default:
failf(data,
"Can't complete SOCKS4 connection to %d.%d.%d.%d:%d. (%d)"
", Unknown.",
(unsigned char)socksreq[4], (unsigned char)socksreq[5],
(unsigned char)socksreq[6], (unsigned char)socksreq[7],
(unsigned int)ntohs(*(unsigned short*)(&socksreq[8])),
socksreq[1]);
return CURLE_COULDNT_CONNECT;
}
}
curlx_nonblock(sock, TRUE);
return CURLE_OK; /* Proxy was successful! */
}